The Mega-Capsules can be found as drops in-game or purchased directly from the in-game store for 700 Daybreak/Marketplace cash. There’s no difference between the dropped and marketplace versions except that the in-game drop version of the capsule must be unlocked using seven stabilizers. Eagle-eyed players may notice that the Mega-Capsules don’t contain either of the game’s first two time capsules (Time Capsule I and Amazon Time Capsule), but if you’re looking for items from either of them, you can now buy any items from these capsules directly from Booster Gold using Quarks. Resurgence Mega-Capsules will be available until October 9th.
Source: Official site via Twitter